./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38a1f42f3cb7a9f66fd0bd1b473ab60f2efbe0fc9c998d9f18da86c331297566 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:17:28,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:17:28,208 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:17:28,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:17:28,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:17:28,252 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:17:28,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:17:28,254 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:17:28,255 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:17:28,256 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:17:28,256 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:17:28,257 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:17:28,258 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:17:28,259 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:17:28,259 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:17:28,260 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:17:28,261 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:17:28,261 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:17:28,262 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:17:28,263 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:17:28,263 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:17:28,264 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:17:28,265 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:17:28,266 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:17:28,267 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:17:28,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:17:28,268 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:17:28,268 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:17:28,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:17:28,270 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:17:28,270 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:17:28,271 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:17:28,271 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:17:28,272 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:17:28,272 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:17:28,273 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:17:28,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:28,274 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:17:28,274 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:17:28,275 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:17:28,276 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:17:28,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:17:28,277 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:17:28,277 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:17:28,278 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:17:28,278 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a1f42f3cb7a9f66fd0bd1b473ab60f2efbe0fc9c998d9f18da86c331297566 [2023-11-19 05:17:28,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:17:28,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:17:28,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:17:28,675 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:17:28,676 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:17:28,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c [2023-11-19 05:17:32,241 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:17:33,186 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:17:33,187 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c [2023-11-19 05:17:33,261 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/data/71a6ac431/e250e2c357d549ac8b8f2906553862c4/FLAG9d6ea87e3 [2023-11-19 05:17:33,284 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/data/71a6ac431/e250e2c357d549ac8b8f2906553862c4 [2023-11-19 05:17:33,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:17:33,297 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:17:33,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:33,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:17:33,305 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:17:33,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,308 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d59ef2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33, skipping insertion in model container [2023-11-19 05:17:33,308 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,668 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:17:36,974 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[380593,380606] [2023-11-19 05:17:37,014 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[383339,383352] [2023-11-19 05:17:37,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:37,490 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:17:39,018 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[380593,380606] [2023-11-19 05:17:39,096 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[383339,383352] [2023-11-19 05:17:39,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:39,238 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:17:39,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39 WrapperNode [2023-11-19 05:17:39,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:39,241 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:39,241 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:17:39,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:17:39,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:39,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:39,841 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 13232 [2023-11-19 05:17:39,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:39,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:17:39,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:17:39,843 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:17:39,854 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:39,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:39,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:39,936 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:40,606 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:40,687 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:40,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:40,764 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:40,876 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:17:40,878 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:17:40,878 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:17:40,878 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:17:40,879 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (1/1) ... [2023-11-19 05:17:40,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:40,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:17:41,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:17:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:17:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:17:41,091 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:17:41,108 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:17:41,109 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:17:41,109 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:17:41,110 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:17:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-19 05:17:41,110 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-19 05:17:41,110 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:17:41,110 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:17:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:17:41,111 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:17:41,111 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:17:41,111 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:17:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:17:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:17:41,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:17:41,314 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:17:41,317 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:17:53,123 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:17:56,334 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:17:56,334 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-19 05:17:56,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:56 BoogieIcfgContainer [2023-11-19 05:17:56,362 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:17:56,365 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:17:56,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:17:56,370 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:17:56,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:17:33" (1/3) ... [2023-11-19 05:17:56,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d2e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:56, skipping insertion in model container [2023-11-19 05:17:56,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:39" (2/3) ... [2023-11-19 05:17:56,372 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d2e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:56, skipping insertion in model container [2023-11-19 05:17:56,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:56" (3/3) ... [2023-11-19 05:17:56,374 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.14.cil.c [2023-11-19 05:17:56,401 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:17:56,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:17:56,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:17:56,525 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@556c7223, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:17:56,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:17:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 05:17:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:17:56,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:56,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:56,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:56,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:56,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1278639831, now seen corresponding path program 1 times [2023-11-19 05:17:56,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:56,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340933410] [2023-11-19 05:17:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:56,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:57,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:57,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340933410] [2023-11-19 05:17:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340933410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:57,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:57,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290288642] [2023-11-19 05:17:57,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:57,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:17:57,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:57,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:17:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:57,308 INFO L87 Difference]: Start difference. First operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:17:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:58,668 INFO L93 Difference]: Finished difference Result 3883 states and 7486 transitions. [2023-11-19 05:17:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:17:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2023-11-19 05:17:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:58,704 INFO L225 Difference]: With dead ends: 3883 [2023-11-19 05:17:58,705 INFO L226 Difference]: Without dead ends: 2032 [2023-11-19 05:17:58,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:58,733 INFO L413 NwaCegarLoop]: 3545 mSDtfsCounter, 3813 mSDsluCounter, 3445 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3813 SdHoareTripleChecker+Valid, 6990 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:58,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3813 Valid, 6990 Invalid, 742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 05:17:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2023-11-19 05:17:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2031. [2023-11-19 05:17:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1967 states have (on average 1.907473309608541) internal successors, (3752), 1971 states have internal predecessors, (3752), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-19 05:17:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 3850 transitions. [2023-11-19 05:17:58,974 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 3850 transitions. Word has length 68 [2023-11-19 05:17:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:58,975 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 3850 transitions. [2023-11-19 05:17:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:17:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 3850 transitions. [2023-11-19 05:17:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 05:17:58,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:58,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:58,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:17:58,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:58,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash 577790917, now seen corresponding path program 1 times [2023-11-19 05:17:58,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:58,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236826884] [2023-11-19 05:17:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:58,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:17:59,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:59,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236826884] [2023-11-19 05:17:59,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236826884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:59,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422686342] [2023-11-19 05:17:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:59,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:59,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:59,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:59,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:17:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:59,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:17:59,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:17:59,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422686342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:59,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:17:59,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:17:59,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811125374] [2023-11-19 05:17:59,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:59,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:59,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:59,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:59,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:17:59,875 INFO L87 Difference]: Start difference. First operand 2031 states and 3850 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:00,503 INFO L93 Difference]: Finished difference Result 2794 states and 5017 transitions. [2023-11-19 05:18:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:00,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2023-11-19 05:18:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:00,529 INFO L225 Difference]: With dead ends: 2794 [2023-11-19 05:18:00,529 INFO L226 Difference]: Without dead ends: 2409 [2023-11-19 05:18:00,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:00,535 INFO L413 NwaCegarLoop]: 3371 mSDtfsCounter, 3528 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 3617 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:00,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 3617 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:18:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2023-11-19 05:18:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2403. [2023-11-19 05:18:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2285 states have (on average 1.8472647702407001) internal successors, (4221), 2290 states have internal predecessors, (4221), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-19 05:18:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 4403 transitions. [2023-11-19 05:18:00,676 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 4403 transitions. Word has length 138 [2023-11-19 05:18:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:00,678 INFO L495 AbstractCegarLoop]: Abstraction has 2403 states and 4403 transitions. [2023-11-19 05:18:00,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 4403 transitions. [2023-11-19 05:18:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 05:18:00,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:00,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:00,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:00,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:00,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:00,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1473264357, now seen corresponding path program 1 times [2023-11-19 05:18:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:00,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616229281] [2023-11-19 05:18:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:18:01,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:01,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616229281] [2023-11-19 05:18:01,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616229281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:01,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698590416] [2023-11-19 05:18:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:01,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:01,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:01,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:01,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:18:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:01,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:01,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:18:01,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:01,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698590416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:01,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:01,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:18:01,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077297253] [2023-11-19 05:18:01,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:01,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:01,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:01,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:01,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:01,610 INFO L87 Difference]: Start difference. First operand 2403 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:02,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:02,249 INFO L93 Difference]: Finished difference Result 3904 states and 6694 transitions. [2023-11-19 05:18:02,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:02,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2023-11-19 05:18:02,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:02,273 INFO L225 Difference]: With dead ends: 3904 [2023-11-19 05:18:02,273 INFO L226 Difference]: Without dead ends: 3147 [2023-11-19 05:18:02,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:02,280 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3522 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3522 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:02,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3522 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:18:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2023-11-19 05:18:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3139. [2023-11-19 05:18:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2915 states have (on average 1.7656946826758146) internal successors, (5147), 2922 states have internal predecessors, (5147), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2023-11-19 05:18:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5493 transitions. [2023-11-19 05:18:02,440 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5493 transitions. Word has length 138 [2023-11-19 05:18:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:02,441 INFO L495 AbstractCegarLoop]: Abstraction has 3139 states and 5493 transitions. [2023-11-19 05:18:02,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5493 transitions. [2023-11-19 05:18:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 05:18:02,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:02,449 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:02,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:02,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 05:18:02,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:02,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1423447547, now seen corresponding path program 1 times [2023-11-19 05:18:02,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:02,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887138802] [2023-11-19 05:18:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:02,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:18:02,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:02,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887138802] [2023-11-19 05:18:02,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887138802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:02,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498491293] [2023-11-19 05:18:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:02,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:02,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:02,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:02,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:18:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:03,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:03,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:18:03,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:03,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498491293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:03,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:03,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:18:03,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572825883] [2023-11-19 05:18:03,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:03,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:03,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:03,218 INFO L87 Difference]: Start difference. First operand 3139 states and 5493 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:03,815 INFO L93 Difference]: Finished difference Result 6100 states and 9998 transitions. [2023-11-19 05:18:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:03,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2023-11-19 05:18:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:03,849 INFO L225 Difference]: With dead ends: 6100 [2023-11-19 05:18:03,850 INFO L226 Difference]: Without dead ends: 4607 [2023-11-19 05:18:03,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:03,860 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3519 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:03,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:18:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2023-11-19 05:18:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 4595. [2023-11-19 05:18:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4163 states have (on average 1.675474417487389) internal successors, (6975), 4174 states have internal predecessors, (6975), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2023-11-19 05:18:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7641 transitions. [2023-11-19 05:18:04,274 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7641 transitions. Word has length 138 [2023-11-19 05:18:04,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:04,277 INFO L495 AbstractCegarLoop]: Abstraction has 4595 states and 7641 transitions. [2023-11-19 05:18:04,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:04,277 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7641 transitions. [2023-11-19 05:18:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 05:18:04,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:04,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:04,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:04,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:04,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:04,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:04,501 INFO L85 PathProgramCache]: Analyzing trace with hash 82022117, now seen corresponding path program 1 times [2023-11-19 05:18:04,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:04,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925994849] [2023-11-19 05:18:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:04,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:18:04,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925994849] [2023-11-19 05:18:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925994849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341937390] [2023-11-19 05:18:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:04,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:04,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:04,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:04,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:18:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:05,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:05,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 05:18:05,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:05,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341937390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:05,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:05,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:18:05,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933577578] [2023-11-19 05:18:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:05,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:05,093 INFO L87 Difference]: Start difference. First operand 4595 states and 7641 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:05,843 INFO L93 Difference]: Finished difference Result 10444 states and 16506 transitions. [2023-11-19 05:18:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:05,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2023-11-19 05:18:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:05,902 INFO L225 Difference]: With dead ends: 10444 [2023-11-19 05:18:05,903 INFO L226 Difference]: Without dead ends: 7495 [2023-11-19 05:18:05,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:05,920 INFO L413 NwaCegarLoop]: 3365 mSDtfsCounter, 3540 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3540 SdHoareTripleChecker+Valid, 3611 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:05,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3540 Valid, 3611 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:18:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7495 states. [2023-11-19 05:18:06,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7495 to 7475. [2023-11-19 05:18:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 6635 states have (on average 1.5950263752825924) internal successors, (10583), 6654 states have internal predecessors, (10583), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2023-11-19 05:18:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 11873 transitions. [2023-11-19 05:18:06,290 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 11873 transitions. Word has length 138 [2023-11-19 05:18:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:06,291 INFO L495 AbstractCegarLoop]: Abstraction has 7475 states and 11873 transitions. [2023-11-19 05:18:06,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 11873 transitions. [2023-11-19 05:18:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 05:18:06,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:06,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:06,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:06,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:06,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:06,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash -23480827, now seen corresponding path program 1 times [2023-11-19 05:18:06,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:06,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745324343] [2023-11-19 05:18:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:06,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:18:06,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:06,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745324343] [2023-11-19 05:18:06,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745324343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:06,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766697779] [2023-11-19 05:18:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:06,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:06,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:06,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:06,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:18:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:07,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:07,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-19 05:18:07,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766697779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:07,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:18:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287525039] [2023-11-19 05:18:07,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:07,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:07,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:07,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:07,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:07,140 INFO L87 Difference]: Start difference. First operand 7475 states and 11873 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:08,313 INFO L93 Difference]: Finished difference Result 19036 states and 29322 transitions. [2023-11-19 05:18:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2023-11-19 05:18:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:08,426 INFO L225 Difference]: With dead ends: 19036 [2023-11-19 05:18:08,426 INFO L226 Difference]: Without dead ends: 13207 [2023-11-19 05:18:08,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:08,463 INFO L413 NwaCegarLoop]: 3363 mSDtfsCounter, 3549 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3549 SdHoareTripleChecker+Valid, 3609 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:08,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3549 Valid, 3609 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:18:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13207 states. [2023-11-19 05:18:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13207 to 13171. [2023-11-19 05:18:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13171 states, 11531 states have (on average 1.535252796808603) internal successors, (17703), 11566 states have internal predecessors, (17703), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2023-11-19 05:18:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13171 states to 13171 states and 20209 transitions. [2023-11-19 05:18:09,379 INFO L78 Accepts]: Start accepts. Automaton has 13171 states and 20209 transitions. Word has length 138 [2023-11-19 05:18:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:09,380 INFO L495 AbstractCegarLoop]: Abstraction has 13171 states and 20209 transitions. [2023-11-19 05:18:09,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 13171 states and 20209 transitions. [2023-11-19 05:18:09,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 05:18:09,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:09,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:09,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:09,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:18:09,629 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:09,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:09,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1259180773, now seen corresponding path program 1 times [2023-11-19 05:18:09,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:09,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146489080] [2023-11-19 05:18:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:18:09,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:09,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146489080] [2023-11-19 05:18:09,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146489080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:09,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032770364] [2023-11-19 05:18:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:09,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:09,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:09,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:09,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_701f98f3-d390-4bf5-987e-94516d18c9ea/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:18:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:10,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:18:10,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-19 05:18:10,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:10,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032770364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:10,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:10,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:18:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546107989] [2023-11-19 05:18:10,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:10,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:10,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:10,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:10,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:10,251 INFO L87 Difference]: Start difference. First operand 13171 states and 20209 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:18:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:11,639 INFO L93 Difference]: Finished difference Result 36028 states and 54554 transitions. [2023-11-19 05:18:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:11,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2023-11-19 05:18:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:11,736 INFO L225 Difference]: With dead ends: 36028 [2023-11-19 05:18:11,736 INFO L226 Difference]: Without dead ends: 24503 [2023-11-19 05:18:11,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:11,792 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3546 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:11,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:18:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24503 states.